package org.shj.netty.chartper4;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

public class TimeServer {

	public void bind(int port) throws Exception{
		//配置服务端的NIO线程组
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup workerGroup = new NioEventLoopGroup();
		try{
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup, workerGroup)
			 .channel(NioServerSocketChannel.class)
			 .option(ChannelOption.SO_BACKLOG, 1024)
			 .childHandler(new ChildChannelHandler());
			
			//绑定端口， 同步等待成功
			ChannelFuture f = b.bind(port).sync();
			
			//等待服务端监听端口关闭
			f.channel().closeFuture().sync();
		}finally{
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}
	
	private class ChildChannelHandler extends ChannelInitializer<SocketChannel>{
		protected void initChannel(SocketChannel channel) throws Exception{
			//增加下面两行，处理TCP 粘包/半包问题
			channel.pipeline().addLast(new LineBasedFrameDecoder(1024));//LineBasedFrameDecoder 以换行符为结束标志的解码器
			channel.pipeline().addLast(new StringDecoder()); //StringDecoder 将接收到的对象转换成字符串
			channel.pipeline().addLast(new TimeServerHandler());
		}
	}
	
	public static void main(String[] args) throws Exception{
		int port = 8080;
		if(args != null && args.length > 0){
			try{
				port = Integer.valueOf(args[0]);
			}catch(NumberFormatException e){
				
			}
		}
		
		new TimeServer().bind(port);
	}
}
